{"id":303809,"date":"2024-05-20T19:08:17","date_gmt":"2024-05-20T11:08:17","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/303809.html"},"modified":"2024-05-20T19:08:22","modified_gmt":"2024-05-20T11:08:22","slug":"java-%e4%b8%ad%e7%9a%84%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e7%bc%96%e7%a8%8b%e5%a6%82%e4%bd%95%e5%ae%9a%e4%b9%89%e5%92%8c%e4%bd%bf%e7%94%a8%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/303809.html","title":{"rendered":"Java \u4e2d\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u5982\u4f55\u5b9a\u4e49\u548c\u4f7f\u7528\u7c7b"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26220027\/8b3db273-727e-4669-9f97-cfaaf4984b6f.webp\" alt=\"Java \u4e2d\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u5982\u4f55\u5b9a\u4e49\u548c\u4f7f\u7528\u7c7b\" \/><\/p>\n<p><p>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff08Object-Oriented Programming, OOP\uff09\u5728Java\u4e2d\u662f\u901a\u8fc7\u5b9a\u4e49\u7c7b\uff08class\uff09\u6765\u5b9e\u73b0\u7684\u3002<strong>\u7c7b\u662f\u521b\u5efa\u5bf9\u8c61\u7684\u84dd\u56fe\u6216\u6a21\u677f\uff0c\u5b83\u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u72b6\u6001\u548c\u884c\u4e3a\u3002<\/strong> \u5728Java\u4e2d\u4f7f\u7528\u7c7b\u6d89\u53ca\u4e24\u4e2a\u4e3b\u8981\u6b65\u9aa4\uff1a\u9996\u5148\uff0c\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff0c\u4ee5\u63cf\u8ff0\u6240\u9700\u7684\u5bf9\u8c61\u7c7b\u578b\u5305\u542b\u7684\u72b6\u6001\u548c\u65b9\u6cd5\uff1b\u5176\u6b21\uff0c\u901a\u8fc7\u4f7f\u7528\u5173\u952e\u5b57 <code>new<\/code> \u6765\u521b\u5efa\u8be5\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5373\u5bf9\u8c61\u3002\u7c7b\u4e2d\u7684\u72b6\u6001\u7531\u5c5e\u6027\uff08\u53d8\u91cf\uff09\u8868\u793a\uff0c\u884c\u4e3a\u7531\u65b9\u6cd5\uff08functions\uff09\u8868\u793a\u3002\u8fd9\u4f7f\u5f97Java\u7a0b\u5e8f\u5177\u6709\u66f4\u9ad8\u7684\u6a21\u5757\u6027\u3001\u7075\u6d3b\u6027\u548c\u6613\u4e8e\u7ef4\u62a4\u7684\u7279\u70b9\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u5b9a\u4e49\u7c7b<\/h3>\n<\/p>\n<p><p>\u5728Java\u4e2d\uff0c\u7c7b\u7684\u5b9a\u4e49\u59cb\u4e8e\u5173\u952e\u5b57 <code>class<\/code> \u540e\u8ddf\u7c7b\u7684\u540d\u79f0\u3002\u540d\u79f0\u5e94\u9075\u5faa\u9a7c\u5cf0\u5f0f\u547d\u540d\u6cd5\uff0c\u9996\u5b57\u6bcd\u5927\u5199\u3002\u7c7b\u4f53\u5185\u90e8\u53ef\u4ee5\u5305\u542b\u53d8\u91cf\u548c\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><h4>\u53d8\u91cf<\/h4>\n<\/p>\n<p><p>\u7c7b\u53d8\u91cf\uff08\u6216\u79f0\u4e3a\u5c5e\u6027\uff09\u5b9a\u4e49\u4e86\u8be5\u7c7b\u5bf9\u8c61\u7684\u5c5e\u6027\u6216\u72b6\u6001\u3002\u8fd9\u4e9b\u53d8\u91cf\u7684\u7c7b\u578b\u53ef\u4ee5\u662fJava\u63d0\u4f9b\u7684\u4efb\u4f55\u7c7b\u578b\uff0c\u5305\u62ec\u57fa\u672c\u6570\u636e\u7c7b\u578b\u548c\u5bf9\u8c61\u7c7b\u578b\u3002<\/p>\n<\/p>\n<p><h4>\u65b9\u6cd5<\/h4>\n<\/p>\n<p><p>\u7c7b\u65b9\u6cd5\u5b9a\u4e49\u4e86\u8be5\u7c7b\u5bf9\u8c61\u7684\u884c\u4e3a\u3002\u4e00\u4e2a\u65b9\u6cd5\u901a\u5e38\u4f1a\u6267\u884c\u4e00\u4e9b\u64cd\u4f5c\u5e76\u53ef\u80fd\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\u3002\u65b9\u6cd5\u7684\u5b9a\u4e49\u5305\u542b\u8fd4\u56de\u7c7b\u578b\u3001\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868\uff08\u53ef\u9009\uff09\u548c\u65b9\u6cd5\u4f53\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u521b\u5efa\u548c\u4f7f\u7528\u5bf9\u8c61<\/h3>\n<\/p>\n<p><p>\u4e00\u65e6\u7c7b\u88ab\u5b9a\u4e49\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 <code>new<\/code> \u5173\u952e\u5b57\u6765\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5373\u5bf9\u8c61\u3002\u6bcf\u4e2a\u5bf9\u8c61\u5c06\u62e5\u6709\u5176\u7c7b\u5b9a\u4e49\u7684\u72b6\u6001\u548c\u884c\u4e3a\u3002<\/p>\n<\/p>\n<p><h4>\u5b9e\u4f8b\u5316\u5bf9\u8c61<\/h4>\n<\/p>\n<p><p>\u5b9e\u4f8b\u5316\u5bf9\u8c61\u662f\u901a\u8fc7\u8c03\u7528\u6784\u9020\u51fd\u6570\uff08constructor\uff09\u6765\u5b8c\u6210\u7684\u3002\u6784\u9020\u51fd\u6570\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u65b9\u6cd5\uff0c\u7528\u4e8e\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u5bf9\u8c61\u72b6\u6001\u3002<\/p>\n<\/p>\n<p><h4>\u8bbf\u95ee\u6210\u5458<\/h4>\n<\/p>\n<p><p>\u5bf9\u8c61\u7684\u6210\u5458\uff08\u5373\u53d8\u91cf\u548c\u65b9\u6cd5\uff09\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u70b9\u64cd\u4f5c\u7b26\uff08<code>.<\/code>\uff09\u6765\u8bbf\u95ee\u3002\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u5bf9\u8c61\u8c03\u7528\u65b9\u6cd5\u6216\u8bbf\u95ee\u5176\u53d8\u91cf\uff0c\u524d\u63d0\u662f\u8fd9\u4e9b\u6210\u5458\u88ab\u58f0\u660e\u4e3a\u516c\u5f00\uff08public\uff09\u8bbf\u95ee\u7ea7\u522b\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u6784\u9020\u51fd\u6570<\/h3>\n<\/p>\n<p><p>\u6784\u9020\u51fd\u6570\u662f\u7c7b\u7684\u7279\u6b8a\u65b9\u6cd5\uff0c\u5b83\u7684\u540d\u79f0\u5fc5\u987b\u4e0e\u7c7b\u540d\u5b8c\u5168\u76f8\u540c\uff0c\u5e76\u4e14\u6ca1\u6709\u8fd4\u56de\u7c7b\u578b\u3002\u6784\u9020\u51fd\u6570\u53ef\u4ee5\u88ab\u91cd\u8f7d\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u6709\u591a\u4e2a\u6784\u9020\u51fd\u6570\uff0c\u53ea\u8981\u5b83\u4eec\u7684\u53c2\u6570\u5217\u8868\u4e0d\u540c\u3002<\/p>\n<\/p>\n<p><h4>\u9ed8\u8ba4\u6784\u9020\u51fd\u6570<\/h4>\n<\/p>\n<p><p>\u5982\u679c\u5728\u5b9a\u4e49\u7c7b\u65f6\u6ca1\u6709\u663e\u5f0f\u5b9a\u4e49\u6784\u9020\u51fd\u6570\uff0cJava\u4f1a\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u7684\u6784\u9020\u51fd\u6570\u3002\u8fd9\u4e2a\u6784\u9020\u51fd\u6570\u4e0d\u505a\u4efb\u4f55\u4e8b\u60c5\uff0c\u4f46\u5141\u8bb8\u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n<p><h4>\u81ea\u5b9a\u4e49\u6784\u9020\u51fd\u6570<\/h4>\n<\/p>\n<p><p>\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u6216\u591a\u4e2a\u6784\u9020\u51fd\u6570\u4ee5\u521d\u59cb\u5316\u5bf9\u8c61\u72b6\u6001\u3002\u81ea\u5b9a\u4e49\u6784\u9020\u51fd\u6570\u901a\u5e38\u7528\u4e8e\u8bbe\u7f6e\u5bf9\u8c61\u7684\u521d\u59cb\u72b6\u6001\u6216\u6267\u884c\u521d\u6b65\u7684\u51c6\u5907\u5de5\u4f5c\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001<\/h3>\n<\/p>\n<p><p>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u4e09\u5927\u6838\u5fc3\u6982\u5ff5\u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001\u5728Java\u4e2d\u5f97\u5230\u4e86\u5168\u9762\u7684\u5e94\u7528\u3002<\/p>\n<\/p>\n<p><h4>\u5c01\u88c5<\/h4>\n<\/p>\n<p><p>\u5c01\u88c5\u662f\u6307\u5c06\u5bf9\u8c61\u7684\u72b6\u6001\uff08\u5c5e\u6027\uff09\u548c\u884c\u4e3a\uff08\u65b9\u6cd5\uff09\u5305\u88c5\u5728\u4e00\u8d77\uff0c\u5e76\u5bf9\u5bf9\u8c61\u7684\u72b6\u6001\u8fdb\u884c\u4fdd\u62a4\u548c\u9690\u85cf\u3002\u8fd9\u662f\u901a\u8fc7\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\u6765\u5b9e\u73b0\u7684\uff0c\u5982 <code>public<\/code>\u3001<code>private<\/code> \u7b49\u3002<\/p>\n<\/p>\n<p><h4>\u7ee7\u627f<\/h4>\n<\/p>\n<p><p>\u7ee7\u627f\u4f7f\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u7ee7\u627f\u53e6\u4e00\u4e2a\u7c7b\u7684\u7279\u6027\u3002\u5728Java\u4e2d\uff0c\u4f7f\u7528 <code>extends<\/code> \u5173\u952e\u5b57\u6765\u5b9e\u73b0\u7ee7\u627f\u3002\u8fd9\u63d0\u4f9b\u4e86\u4e00\u79cd\u5f3a\u5927\u7684\u65b9\u6cd5\u6765\u91cd\u7528\u4ee3\u7801\u3002<\/p>\n<\/p>\n<p><h4>\u591a\u6001<\/h4>\n<\/p>\n<p><p>\u591a\u6001\u662f\u6307\u5141\u8bb8\u4f7f\u7528\u4e00\u4e2a\u5171\u540c\u7684\u63a5\u53e3\u6765\u8bbf\u95ee\u591a\u4e2a\u5f62\u6001\u7684\u5bf9\u8c61\u3002\u5b83\u662f\u901a\u8fc7\u8986\u76d6\uff08Override\uff09\u548c\u91cd\u8f7d\uff08Overload\uff09\u65b9\u6cd5\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n<\/p>\n<p><p>\u901a\u8fc7\u6df1\u5165\u7406\u89e3\u548c\u5e94\u7528\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6982\u5ff5\uff0cJava\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u9ad8\u6548\u3001\u6613\u4e8e\u7ef4\u62a4\u548c\u62d3\u5c55\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<strong>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e0d\u4ec5\u662fJava\u7f16\u7a0b\u7684\u57fa\u77f3\uff0c\u4e5f\u662f\u7406\u89e3\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u7684\u5173\u952e\u3002<\/strong><\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u7c7b\u662f\u5982\u4f55\u5b9a\u4e49\u7684\uff1f<\/strong><\/p>\n<p>\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u7c7b\u662f\u4e00\u79cd\u7528\u6237\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b\u3002\u901a\u8fc7\u5b9a\u4e49\u7c7b\uff0c\u6211\u4eec\u53ef\u4ee5\u5c01\u88c5\u6570\u636e\uff08\u5c5e\u6027\uff09\u548c\u884c\u4e3a\uff08\u65b9\u6cd5\uff09\u5728\u4e00\u4e2a\u5355\u4e00\u7684\u5b9e\u4f53\u4e2d\u3002\u7c7b\u5b9a\u4e49\u662f\u901a\u8fc7\u4f7f\u7528\u5173\u952e\u5b57&quot;class&quot;\u6765\u5f00\u59cb\u7684\uff0c\u540e\u9762\u8ddf\u7c7b\u7684\u540d\u79f0\u548c\u4e00\u5bf9\u5927\u62ec\u53f7\u3002<\/p>\n<p><strong>2. \u7c7b\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\uff1f<\/strong><\/p>\n<p>\u5728Java\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u5bf9\u8c61\u6765\u4f7f\u7528\u7c7b\u3002\u901a\u8fc7\u4f7f\u7528\u5173\u952e\u5b57&quot;new&quot;\u548c\u7c7b\u540d\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u4f8b\u5316\u4e00\u4e2a\u7c7b\u5e76\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u3002\u521b\u5efa\u5bf9\u8c61\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbf\u95ee\u8be5\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u70b9\u64cd\u4f5c\u7b26\uff08.\uff09\u6765\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\u3002<\/p>\n<p><strong>3. 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Programming, OOP\uff09\u5728Java\u4e2d\u662f\u901a\u8fc7\u5b9a\u4e49\u7c7b\uff08cl [&hellip;]","protected":false},"author":3,"featured_media":303813,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/303809"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=303809"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/303809\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/303813"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=303809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=303809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=303809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}